Pigror, pigraris, pigrari. Cic.To be flow: to be loth or vnlusty to doe a thing.Scribere ne pigrere.Cic.Be not loth to write.
Lewis and Short: Latin dictionary
pīgro, āvi, ātum, 1, v. n. [piger], to be indolent, slow, dilatory (ante-class.), Lucr. 1, 410: melius pigrasse quam properasse est hoc nefas, Att. ap. Non. 154, 2 (Trag. Rel. p. 144 Rib.): cur propter haec pigrem?id. ib. 153, 32 (Trag. Rel. p. 147 Rib.).